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NAS1305-21
Bolt
Description
Fastener Length: 1-3/4", Thread: 1/4-24, Thread Length: 15/32"
Specifications
| Fastener Length | 1.781 |
|---|---|
| Grip Diameter | 0.3110 inches minimum and 0.3120 inches maximum |
| Grip Length | 1.312 |
| Hardness Rating | 36.0 rockwell c minimum and 40.0 rockwell c maximum |
| Head Height | 0.156 |
| Head Style | Dished hexagon |
| Length | 1 3/4 |
| Material | Steel |
| Material Specification | Mil-s-5626 mil spec 1st material response or mil-s-5000 mil spec 2nd material response or mil-s-8503 mil spec 3rd material response or mil-s-6098 mil spec 4th material response or mil-s-6049 mil spec 5th material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.469 inches minimum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.492 inches minimum and 0.502 inches maximum |
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for NAS1305-21 — functionally equivalent.
- NAS6605-21 Listed alternate 24.00-24 · 1-3/4 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error